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(1) A fair coin is tossed 4 times. What is the probability that we get at least 2 heads? 12 marks] (2) Distribute 4 different balls into 4 boxes (multiple occupancy is allowed). How many arrangements are possible? [2 marks] (3) Which is greater? The probability of getting at least one 6 throwing a die 6 times, or the probability of getting at least two sixes throwing a die 12 times... [3 marks] (4) (part one) Student A is present 60% of the time and student B is absent 60% of the time. What is the probability of both being present? [1 mark] (part two) Student C is present 60% of the time and student D is present with probability . What is the probability that both C and D are present? [2 marks]
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